Final answer:
The correct response for a train operator when encountering an unattended red lantern is to stop the train and become stationary, similar to a driver stopping at a red traffic light.
Step-by-step explanation:
The correct answer is option A: Stop moving and become stationary till it passes by. When a train operator sees an unattended red lantern adjacent to his track, it is a signal similar to a red traffic light for vehicles. It typically indicates that the train must come to a complete stop and remain stationary.
This could be for various safety reasons such as track work, another train ahead, or an emergency situation.
In the context given, it seems that the operator is expected to halt the train, just as a driver would be expected to stop at a red traffic light, despite any urgencies unless specific exceptions apply, such as in the case described where an emergency vehicle or situation might override the standard rule.
The correct answer is option a. When a train operator brings his train to a stop and sees an unattended red lantern adjacent to his track, he must stop moving and become stationary until the lantern passes by.
This rule is similar to the rule that states you must stop your vehicle at a red traffic light. Just like how drivers must wait for the traffic light to turn green before proceeding, train operators must wait for the red lantern to pass before they can continue their journey.
By following this rule, train operators ensure safety and prevent accidents or collisions on the tracks.